Product DescriptionAll items are 100% Brand New in Original Condition guarantee. Battery Type: Dummy Battery (AA Size) Battery Size(approx.): 5cm x 1.4cm (50mmx14mm) Weight : 4.8g(1pc) The terminals in each dummy battery are shorted, so electric current can pass through these dummies. It's only Conductor,connected positive and negative inside,Non Battery, can be used with AA Size 3.2V LiFePO4(Lithium Iron Phosphate)Battery only. It works as occupying the vacancy of battery compartment and conducting electricity.
- Hot Dummy Fake Battery Setup Shell
- Placeholder Cylinder False Battery (4-pack)
- 2A Size Conduct Conductor Electric Current
- Works as occupying the vacancy of battery compartment and conducting electricity
Top ReviewsPerfect to use rechargeables... here is some info:
by Lee Hester (5 out of 5 stars)
January 30, 2016
Perfect "batteries" to take the place of same sized actual batteries to enable you to use Li-Ion and Li-FePo4 replacements. Many remotes and other devices run on about 3 volts and are set up to use 2 non-rechargeable batteries of 1.5 volts apiece in series to supply the 3 volts. Li-Ion and Li-FePo4 batteries are slightly more than 3 volts for a SINGLE battery. Thus, one Li-Ion or Li-FePo4 battery will easily power a device that is set up to use 2 non-rechargeable batteries. But what do you do about the other slot where a battery is supposed to go in your device??? You could run a jumper wire across and solder it... but that requires some real time and effort. Putting a dummy battery works just fine. If you understand the difference between batteries in "series" and "parallel" this should all make sense to you. If not, you might read up on it. But if your device uses 2 or 4 batteries and they are either put in end to end, or are alongside each other facing opposite directions, then they are probably wired in series and you can use a half and half mix of these and rechargeable Li-Ion or Li-FePo4 batteries to run it.
Fit Perfectly and Do Their Job Perfectly, Too. Overpriced, However.
by M Cox (5 out of 5 stars)
December 21, 2017
These dummy batteries fit perfectly and do their function just as perfectly. My wife picked one up after I unpacked the set from the box and asked why it was so lightweight. I told her it is just an empty shell with a wire going from one end to the other. Anticipating her next question I explained it is to cut the voltage in half with pairs of rechargeable lithium batteries. A new alkaline battery is typically about 1.6 Volts and a non-rechargeable lithium battery is about 1.85 volts. Most all electronics will handle non-rechargeable 1.85 volt batteries. The rechargeable lithium batteries are 3.7 volts, exactly twice as much voltage as a non-rechargeable lithium battery. It makes me wonder why they can't create a rechargeable lithium battery that is 1.85 volts, just like the non-rechargeable versions. But there is probably a good technical reason why it's not available on the market.
In the meantime, the 3.7-volt rechargeable lithium batteries are abundantly available along with universal chargers. There's somewhat of a startup investment to take advantage of this method of switching from pairs of standard non-rechargeable batteries to rechargeable batteries. These dummy batteries are vastly overpriced, but they are not in full production quantities yet - still waiting for the demand to catch up.
The same scheme is available for AAA batteries as well. I bought some AAA rechargeable lithium batteries with a regulating circuit in the end that made it 2 mm longer than a standard AAA battery thinking the spring would allow the extra length. I was wrong - too long. Now I need to buy some AAA batteries that are standard length. They won't have the safety circuit, but they will fit. The AAA version of this dummy battery was exactly correct of course - just the battery was the problem. I won't buy any more batteries that are 2 mm too long. They are useless if they won't fit - cost quite a lot extra, too. I'll probably find a place I can use the extra long batteries eventually, but so far, I haven't found anything where they will fit. You have to have pairs of batteries: One dummy battery and one 3.7 volt rechargeable lithium battery. If you have four batteries, you need two dummy batteries - doesn't matter what order you put them.
Fantastic. They do EXACTLY what they are supposed to do.
by M_ (5 out of 5 stars)
December 18, 2018
Fantastic. They do EXACTLY what they are supposed to do.
I use them in an aroma therapy blower that used 2 AA batteries. This makes the aroma too strong, so I replaced 1 battery with this blank and it is working perfectly. The fan spins much slower so the aroma isn't too strong.
I can use them in my bathroom when guests are over and keep it turned on without the aroma getting to strong.
The only issue with using only 1 battery is the LED doesn't light up. I was hoping it would light, but because of the voltage drop, I wasn't expecting it.
How hard can it be?
by L. Waterfield (1 out of 5 stars)
January 8, 2019
These are dummy AA cells, used to take up space if you are replacing some AA cells with more powerful AA cells. All they are is a conductor in the form factor of an AA cell. Simple, right? Too bad one of our "cells" was an open circuit. Did not work. It's only job was to connect the two contacts together and it couldn't do that. So I got 3 dummy "cells" for my money.
I just cut away some of this plastic with an xacto knife and it's fine.
by K. Lu (4 out of 5 stars)
November 11, 2017
Works as expected. The only issue is that there is a bit too much of the plastic wrapping on the bottom, so only a small circle is exposed, whereas a real battery has almost the entire bottom exposed. This can make connections off a bit if not totally centered. I just cut away some of this plastic with an xacto knife and it's fine.
by Zach Turner (5 out of 5 stars)
October 19, 2017
Bought these along with some 14500 Li-Ion batteries for a 2 Cell Mini Maglite. Dummy batteries work as expected and seem to be a decent quality. They're about 0.5 mm longer than a standard AA but should work fine in anything that requires a AA or 14500.
Appears very well made and reasonably priced, works well for my purpose and I am pleased.
by Dan King (5 out of 5 stars)
September 17, 2018
Appears very well made and reasonably priced. What can I say? These work well converting two 1.5V AA size Alkaline batteries to one 3.7V AA size Rechargeable Lithium and the Dummy in an LED flashlight. Might not work in other items or even damage them. Check your device specifications or consult with a friend who has a degree in Electrical Engineering first.
Expensive for a product that is a dummy replacement.
by LED nut (1 out of 5 stars)
March 26, 2019
Since LiPo batteries are 3.2 volts and normal AA batteries are 1.5 to 1.6, I got these to make sure I didn't over power the item I was using which took 8 normal batteries. While they work ok, i just have a problem paying this price for something that is designed to do nothing. I was generous giving it 2 stars, because they seerved the purpose I needed them for, but the price is horrible.
Works with Boafeng AA Alkaline battery pack
by 人 (5 out of 5 stars)
December 30, 2018
I needed a dummy AA to use with a Boafeng radio AA battery pack. The pack requires a dummy AA in place of a sixth battery when using Alkalines. These worked perfectly.
Works as expected
by Cory Salvesen (5 out of 5 stars)
September 29, 2017
Ok so what we used this for is a battery operated drink stirrer. The stirrer would go so fast on 2 AA batteries, it would splatter all over. Using one of these allows us to run it on half voltage and therefore it ran slow enough to be useful.
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